Dion Dock has commented on the following diary entries

I think it's Java's fault since I've heard someone else mention it happening on their Mac, and presumably not on their Windows box. I don't recall seeing any errors appear in Terminal when this happens.

I wouldn't necessarily believe a single GPS track is more accurate than the original data. Hike (or drive or ride) a loop a few times and look at the resulting data. In my experience, they are close but aerial imagery is better.

I don't know whether a super-relation would solve your problem or not; they seem to be a work in progress.

I really don't like having area nodes (like city limits) joined to other nodes (like highways). It's really hard to make a change to one without affecting the other. For example, the city limit follows a freeway that is later split into two one way tracks. Now moving either half of the freeway moves the city limit.

I should have been more clear. Keepright has a JOSM and a Potlatch option for fixing errors. While my Mac has JOSM as a standalone bundle, choosing the JOSM option in Keepright does nothing, presumably because it's trying to launch the "JOSM in a browser" version...right?

Sorry, not to knock the other 49 states. :) I'm under the impression that the various regions tend to do things similarly based on what the local map looks like. It seems pretty difficult to get the entire state/country/world to agree on the same standards. Maybe that's another diary entry.